The Augustus Journal
Mega Backdoor Roth: What It Is & How It Works
5 Takeaways
- The Mega Backdoor Roth allows higher contributions to a Roth IRA using after-tax 401(k) contributions.
- Not all employer plans offer after-tax contributions or in-service rollovers needed for this strategy.
- Congress has discussed eliminating the Mega Backdoor Roth, but it’s still allowed in 2024.
- In 2024, you can contribute up to $66,000 in after-tax 401(k) funds if eligible.
- The Mega Backdoor Roth is best for high-income earners who want to maximize tax-free retirement savings.
If you’re a high-income earner looking for more ways to boost your retirement savings, you might feel stuck once you’ve maxed out your regular 401(k) and IRA contributions. Enter the mega backdoor Roth – a little-known strategy that can supercharge your Roth IRA contributions and grow your savings tax-free. But before you jump in, it’s important to understand how it works and whether it’s right for you. In this blog, we’ll break down everything you need to know about this powerful retirement tool so you can make the most of it while it’s still available. Let’s dive in!

What is the mega backdoor Roth?
The mega backdoor is a strategy that allows high-income earners to contribute significantly more than the standard limits allow. It’s a way to take advantage of after-tax contributions to your 401(k) plan, which can then be converted into a Roth IRA. Essentially, if your employer’s plan allows for after-tax contributions, you could contribute up to $66,000 (in 2024), far exceeding the usual Roth contribution limits. This strategy is most beneficial for those who are maxing out their traditional 401(k) contributions and are looking for additional ways to save for retirement in a tax-advantaged account.
The strategy isn’t available to everyone, as it depends on your employer’s plan offering after-tax contributions and in-service rollovers. If your plan allows these features, it can be a powerful tool to supercharge your retirement savings while growing them tax-free.
What is the 5-year rule for mega backdoor Roth?
The 5-year rule for a mega backdoor Roth IRA conversion is something you’ll want to keep in mind when considering this strategy. The rule states that Roth IRA conversions – including those from after-tax 401(k) contributions – must remain in the Roth account for at least five years before any earnings can be withdrawn tax-free. This means you’ll want to plan ahead if you intend to tap into your Roth IRA before that time frame.
Here are some key points to understand about the 5-year rule:
- Applies to each conversion: Every time you convert funds to a Roth IRA, the 5-year clock starts again for that specific conversion.
- Earnings vs. principal: While the earnings on your converted amount are subject to the 5-year rule, the principal (the amount you contributed) can usually be withdrawn tax-free anytime.
- Age matters: If you’re over 59 ½, you’re in a better position because you can access your funds without penalty, but the 5-year rule for tax-free earnings still applies.
This rule is crucial because withdrawing funds too early could result in taxes and penalties on the earnings, making it essential to time your conversions thoughtfully.
Is mega backdoor Roth going away?
With changing tax laws and ongoing discussions in Congress, there have been concerns about whether it will continue to be allowed. In 2021, there were proposals to eliminate this strategy as part of tax reform efforts, primarily aimed at limiting tax benefits for high-income earners. However, as of now, no law has been passed that officially puts an end to the mega backdoor Roth.
While there’s always a chance that this strategy could face limitations in the future, it remains available today. It’s essential to stay informed about potential changes to tax laws and consult a financial advisor if you’re considering implementing this strategy.
Is mega backdoor Roth still allowed in 2024?
Yes, the Mega Backdoor Roth is still allowed in 2024. Despite the proposals that aimed to eliminate this strategy in recent years, it remains a viable option for those who want to maximize their Roth IRA contributions. The contribution limits for 2024 remain generous, allowing after-tax 401(k) contributions of up to $66,000 (if your plan allows it).
It’s worth noting that this could change in the future, so those who are interested in using the Mega Backdoor Roth should act while it’s still available. Monitoring any updates from Congress or the IRS can help ensure you don’t miss out on this opportunity.
Is mega backdoor worth it?
The mega backdoor Roth can be incredibly valuable for those who are already maxing out their other retirement accounts and have extra income they want to shelter from taxes. However, whether it’s “worth it” depends on several factors, including your income level, your employer’s plan options, and your long-term retirement goals.
Here are a few reasons the mega backdoor Roth might be worth it:
- Maximize tax-free growth: Converting after-tax contributions to a Roth IRA allows your investments to grow tax-free, which is especially powerful over long periods.
- No required minimum distributions (RMDs): Unlike traditional IRAs, Roth IRAs do not require RMDs, which means you can let your investments grow longer.
- Flexibility in retirement: Roth IRAs offer more flexibility for retirement income planning, as withdrawals are tax-free.
- High contribution limits: The ability to contribute up to $66,000 (2024 limit) far exceeds the standard Roth IRA contribution limits, making this a powerful tool for high-income earners.
- Ideal for those nearing retirement: If you’re close to retirement and want to boost your tax-free income, the mega backdoor Roth can help maximize your savings in a short amount of time.
However, it’s important to consider whether your employer’s plan allows after-tax contributions and in-service rollovers. Additionally, make sure you’re in a position to handle the tax implications of the conversion without pushing yourself into a higher tax bracket. Consulting with a financial professional can help you determine if this strategy fits your financial plan.

Who can help me navigate mega backdoor Roth as an employer or business owner?
Exploring the potential of a mega backdoor Roth IRA can open up substantial opportunities for your retirement savings. At Augustus Wealth, we’re here to answer all your questions and provide the clarity you need to navigate this sophisticated investment strategy.
Our team offers personalized portfolio and investment management strategies that align with your financial objectives, helping you maximize the benefits of your Roth IRA. If you’re near Travis Heights or another part of the city, reach out to us for tailored solutions today!
DISCLOSURE:
Augustus Wealth, LLC is a registered investment adviser. Advisory services are only offered to clients or prospective clients where Augustus Wealth, LLC and its representatives are properly licensed or exempt from licensure. This financial planning assessment is solely for informational purposes. Past performance is no guarantee of future returns. Investing involves risk and possible loss of principal capital. This assessment is built based off information provided by the client and cannot be relied upon as financial advice. No advice may be rendered by Augustus Wealth, LLC unless a client service agreement is in place.
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